Penguin Tetra — Blackline Penguinfish (Thayeria boehlkei)
Penguin Tetra — Blackline Penguinfish (Thayeria boehlkei)
The Blackline Penguinfish (Thayeria boehlkei), also known as the Penguin Tetra, is a unique schooling fish named for its distinctive head-up swimming posture. Originating from the Amazon basin in Brazil, this peaceful species is rated as easy care and can live up to 5 years.
Care at a Glance
| Scientific Name | Thayeria boehlkei |
| Family | Characidae |
| Origin | South America (Brazil, Amazon) |
| Care Level | Easy |
| Temperament | Peaceful |
| Adult Size | 8 cm |
| Minimum Tank Size | 80 litres |
| Temperature | 22–26°C |
| pH Range | 6.0–7.5 |
| Water Hardness | 5–15 dGH |
| Diet | Flakes, micro pellets, small live foods |
| Lifespan | 5 years |
| Tank Region | Middle |
| Group Size | 6+ (schooling) |
Origin & Natural Habitat
The Blackline Penguinfish is endemic to the Amazon River basin and Araguaia River in Peru and Brazil. In the wild, they inhabit slow-moving waters among vegetation. Their distinctive angled swimming posture and bold black stripe make them instantly recognisable.
Tank Setup & Water Parameters
Provide a minimum of 80 litres with gentle filtration and well-oxygenated water. Adults reach approximately 8 cm. Maintain water temperature between 22–26°C with a pH of 6.0–7.5 and hardness of 5–15 dGH. They appreciate some water flow.
Feeding Guide
The Blackline Penguinfish is an omnivore. Offer quality flakes, micro pellets, and small live or frozen foods such as daphnia and brine shrimp. They are unfussy eaters. Feed small amounts twice daily.
Compatible Tank Mates
Good companions include other tetras, corydoras, rasboras, and dwarf cichlids. Avoid large aggressive fish. You might also consider species such as Royal Tetras, Red Phantom Tetras, and Red Golden Pencilfish from our collection.
Why Buy from Tropical Fish Co?
At Tropical Fish Co, every fish is carefully selected and shipped with care across the UK. We offer live arrival guarantee, expert advice, and competitive prices. Order your Blackline Penguinfish today and enjoy next-day delivery to your door.